In the album below, in “All tracks performed,” “Joseph Pons” is identified as a performer. But that seems to be a misspelling (for Josep Pons). And when I click on “Joseph Pons,” I get no information, which seems to mean that Roon doesn’t really have anything about the person with that name.
I cannot find a place where I can remove “Joseph Pons.”
This is what I do in similar cases. Select the tracks where the performer is listed and then choose Edit from the top right menu. Remove Credit for Joseph Pons and Add Credit for Josep Pons.